CVE-2025-26772 in Kit for Elementor Plugin
Summary
by MITRE • 02/17/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Detheme DethemeKit For Elementor allows Stored XSS. This issue affects DethemeKit For Elementor: from n/a through 2.1.8.
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Analysis
by VulDB Data Team • 03/20/2025
The vulnerability CVE-2025-26772 represents a critical cross-site scripting flaw in the Detheme DethemeKit For Elementor plugin, specifically categorized under CWE-79 Improper Neutralization of Input During Web Page Generation. This weakness enables attackers to inject malicious scripts into web pages viewed by other users, creating a persistent security risk that can affect multiple visitors simultaneously. The vulnerability exists within the plugin's handling of user input during web page generation processes, where insufficient sanitization allows malicious code to be stored and subsequently executed in the context of affected users' browsers.
The technical flaw manifests when the DethemeKit For Elementor plugin fails to properly validate and sanitize user-supplied data before incorporating it into dynamically generated web content. This improper neutralization occurs during the web page generation phase where user inputs are directly embedded into HTML output without adequate encoding or filtering mechanisms. Attackers can exploit this vulnerability by crafting malicious payloads that get stored within the plugin's data handling mechanisms, making the XSS attack persistent rather than reflected. The vulnerability affects all versions of the plugin from the initial release through version 2.1.8, indicating a long-standing issue that has not been adequately addressed in the development lifecycle.
The operational impact of this stored XSS vulnerability is significant as it allows attackers to execute malicious scripts in the context of any user who views the affected web pages. This can lead to session hijacking, credential theft, redirection to malicious websites, data exfiltration, and potential full compromise of user accounts. The persistent nature of stored XSS means that once the malicious payload is injected, it will affect all subsequent visitors to the compromised pages without requiring additional user interaction. This vulnerability particularly threatens websites using Elementor page builder frameworks where user-generated content is frequently processed and displayed, creating multiple potential attack vectors.
Security professionals should implement immediate mitigations including updating to the latest version of the DethemeKit For Elementor plugin once available, implementing strict input validation and output encoding mechanisms, and monitoring for suspicious user activity or unauthorized content modifications. Organizations should also consider implementing content security policies to limit script execution capabilities and deploy web application firewalls to detect and block malicious payloads. The vulnerability aligns with ATT&CK technique T1566.001 for initial access through malicious content and T1071.001 for application layer protocol usage. Additionally, this issue demonstrates the critical importance of input sanitization practices and proper security testing throughout the software development lifecycle, as highlighted in OWASP Top 10 2021 category A03: Injection and the CWE-79 weakness classification.